Nutron Collar Double Pro Scooter Clamp

The Nutron 2-bolt collar clamp may be compact, yet it offers an astounding grip force. This design includes a steel insert with threads, allowing you to tighten the clamp as much as you wish without worrying about stripping.
Material is strategically eliminated from the clamp body to reduce weight while preserving the strong clamp force.

The overall weight is merely 70g.